How to find which computer is infected with malware

I am a OpenDNS User, and they alerted me that a computer in my network is trying to access js.tongji.linezing.com which is related to certain malware.
How can I find the one out of 60 computers which is the infected one?

I am a OpenDNS User, and they alerted me that a computer in my network is trying to access js.tongji.linezing.com which is related to certain malware.
How can I find the one out of 60 computers which is the infected one?

Check linezing.com ip address and then start a tcpdump from console listening on lan for traffic on this ip